Ed Sheeran performs during the Italian State RAI TV program "Che Tempo che Fa," in Milan, Italy on March 12, 2017.

Ed Sheeran performs during the Italian State RAI TV program "Che Tempo che Fa," in Milan, Italy on March 12, 2017.

AP Photo/Antonio Calanni

Ed Sheeran is the top musical act in the U.S., holding atop the Billboard Artist 100 chart (dated April 1), as his album ÷ spends a second week at No. 1 on the Billboard 200 and its lead single "Shape of You" scores an eighth week atop the Billboard Hot 100. Sheeran leads the Artist 100 for a fourth total week.

The Artist 100 (which launched in July 2014) measures artist activity across key metrics of music consumption, blending album and track sales, radio airplay, streaming and social media fan interaction to provide a weekly multi-dimensional ranking of artist popularity.

Impressively, Sheeran is the fifth artist to dominate the Billboard 200, Hot 100 and Artist 100 simultaneously, with all five now having tripled up for multiple weeks each. Before Sheeran's two-week trifecta, Taylor Swift ran up seven such triple-threat weeks in 2014-15, followed by The Weeknd (two, 2015), Adele (six, 2015-16) and Drake (a record nine, 2016).

Sheeran's album ÷ paces the Billboard 200 for a second week, with 180,000 equivalent album units in the week ending March 16, according to Nielsen Music (down 60 percent from its 451,000-unit debut, the most for an album in 2017). On the Hot 100, the set's lead single "Shape of You" reigns for an eighth week. On the Artist 100, album sales account for the greatest share (42 percent) of Sheeran's overall activity.

Rounding out the latest Artist 100's top five, Metallica rises 4-2, revisiting its highest rank, as its album Hardwired...To Self-Destruct is the Greatest Gainer at No. 2 on the Billboard 200; Bruno Mars dips 2-3; Future falls 3-4; and The Weeknd is steady at No. 5.

Check out this week's entire Artist 100 here.